So while obesity and overweight are technical terms, there is a lot of evidence showing there's discrimination against fat people. Even at their doctor's office (see this: statnews.com/2017/08/15/cancer-dia...)

People discriminate against them all the time when a lot of fatness is due to genetics and/or toxic diet culture that ruins metabolisms. We shouldn't be excluding obese people from our community by implying that obese = bad.